System Profiler and Benchmark
HardInfo can gather information about your system's hardware and operating system, perform benchmarks, and generate printable reports either in HTML or in plain text formats.
It can also be easily extended, for developer documentation and full source code (released under GNU GPL version 2) is available.
The most recent version of HardInfo is 0.5.1, which was released on April 6, 2009. See the download page for download options.
See HardInfo Run
You can see a screencast that show HardInfo in action; it is a little outdated, but should give you an idea of how HardInfo works. Alternatively, you may also see some screenshots.
Nice System Tool and it runs well in Fedora 14. It's in my Repos too...